Nowadays, there are more and more people in koi farming, but how many people understand the structure of koi?
For the structure of the koi, it is still possible to understand part of it simply from the appearance, but for the internal structure, we need to dissect it.
Reminder: The scene is bloody, if you are eating, please watch it later!
From the appearance, the body of the koi is divided into three parts: head, torso and tail.
There is a mouth at the front of the head, two snouts at the corners of the mouth, eyes on the sides of the middle, and gills on the posterior lower part of the eye.
From the trunk to the vocal part, the pectoral fin, dorsal fin, ventral fin, fin and caudal fin grow in turn. The fish body is covered with scales.
All fish have a sensory organ called a "line-measuring" and a series of recreational tweezers with small holes or micropores that flap along the sides of the prep, looking like a row of dots.
These small holes open in a small jumping tube under the scales, which runs along the sides of the fish body. Inside the tubule are many hair cells connected to nerve fibers, which conduct the stimulation to the spinal cord and then to the brain.
Any movement of the liquid in the lateral tubules stimulates the hair cells, allowing the koi to sense vibrations in the water, which may come from reflections from other fish, or from obstacles, or even by the sound of human footsteps.
muscles:
The muscles of all vertebrates have three basic forms:
smooth muscle, more often divided on the wall of the tubes of arterial vessels and large venous vessels, as well as on the walls of the intestine responsible for food movement;
The heart muscle and the rhabdomy muscle, associated with movement, attach to the bone through tendons. In the upper body of a fish, this muscle forms a series of "W" shaped muscle masses, called the macrocephalange muscles, which surround the fish body and produce a thrust during movement.
skeleton:
The Skeletal Series is a complex structure that has two main functions.
The first is to provide support, forming a rigid structure for the attachment of muscles, which either depend directly on tendons or through cartilage.
Second, to protect susceptible sensory organs and tissues, for example, hair and eyes are wrapped inside the skull.
Mechanism and function of the gills:
Oxygen in the water passes through the gills of the fish into the bloodstream, and exhaust gases such as carbon dioxide are eliminated.
The gills are also important organs for the elimination of nitrogen-containing exhaust, which includes 82% ammonia and 8% urea.
The remaining 10% of the nitrogen-containing dirt is excreted by the kidneys in the form of urea with the urine.
The basic role of the swim bladder is to control buoyancy, and the early maw is connected to the digestive tube.
In fact, fish can swallow air on the surface of the water to enter the swim bladder, and usually the gas content in the swim bladder is controlled by several blood vessels.
For koi (and many other koi species of fish), the swim bladder can also amplify the sound, passing it to the inner ear through a series of small bones.